<html>
 <head>
  <link href="./leetcode-problem.css" rel="stylesheet" type="text/css">
 </head>
 <body>
  <div class="question_difficulty">
   难度：Easy
  </div>
  <div>
   <h1 class="question_title">
    1044. Find Common Characters
   </h1>
   <p>
    Given an array&nbsp;
    <code>
     A
    </code>
    of strings made only from lowercase letters, return a list of all characters that show up in all strings within the list
    <strong>
     (including duplicates)
    </strong>
    .&nbsp;&nbsp;For example, if a character occurs 3 times&nbsp;in all strings but not 4 times, you need to include that character three times&nbsp;in the final answer.
   </p>
   <p>
    You may return the answer in any order.
   </p>
   <p>
    &nbsp;
   </p>
   <div>
    <p>
     <strong>
      Example 1:
     </strong>
    </p>
    <pre>
<strong>Input: </strong><span id="example-input-1-1">["bella","label","roller"]</span>
<strong>Output: </strong><span id="example-output-1">["e","l","l"]</span>
</pre>
    <div>
     <p>
      <strong>
       Example 2:
      </strong>
     </p>
     <pre>
<strong>Input: </strong><span id="example-input-2-1">["cool","lock","cook"]</span>
<strong>Output: </strong><span id="example-output-2">["c","o"]</span>
</pre>
     <p>
      &nbsp;
     </p>
     <p>
      <strong>
       <span>
        Note:
       </span>
      </strong>
     </p>
     <ol>
      <li>
       <code>
        1 &lt;= A.length &lt;= 100
       </code>
      </li>
      <li>
       <code>
        1 &lt;= A[i].length &lt;= 100
       </code>
      </li>
      <li>
       <code>
        A[i][j]
       </code>
       is a lowercase letter
      </li>
     </ol>
    </div>
   </div>
  </div>
  <div>
   <h1 class="question_title">
    1044. 查找常用字符
   </h1>
   <p>
    给定仅有小写字母组成的字符串数组
    <code>
     A
    </code>
    ，返回列表中的每个字符串中都显示的全部字符（
    <strong>
     包括重复字符
    </strong>
    ）组成的列表。例如，如果一个字符在每个字符串中出现 3 次，但不是 4 次，则需要在最终答案中包含该字符 3 次。
   </p>
   <p>
    你可以按任意顺序返回答案。
   </p>
   <p>
    &nbsp;
   </p>
   <p>
    <strong>
     示例 1：
    </strong>
   </p>
   <pre><strong>输入：</strong>["bella","label","roller"]
<strong>输出：</strong>["e","l","l"]
</pre>
   <p>
    <strong>
     示例 2：
    </strong>
   </p>
   <pre><strong>输入：</strong>["cool","lock","cook"]
<strong>输出：</strong>["c","o"]
</pre>
   <p>
    &nbsp;
   </p>
   <p>
    <strong>
     提示：
    </strong>
   </p>
   <ol>
    <li>
     <code>
      1 &lt;= A.length &lt;= 100
     </code>
    </li>
    <li>
     <code>
      1 &lt;= A[i].length &lt;= 100
     </code>
    </li>
    <li>
     <code>
      A[i][j]
     </code>
     是小写字母
    </li>
   </ol>
  </div>
 </body>
</html>